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be.dvw.administration.mvc.navigation.LeftMenuXSLTImpl	100%	100%

1		package be.dvw.administration.mvc.navigation;
2
3		import be.dvw.administration.util.FileUtils;
4		import be.dvw.administration.util.PropertyManager;
5		import org.apache.commons.logging.Log;
6		import org.apache.commons.logging.LogFactory;
7		import org.dom4j.Document;
8		import org.dom4j.DocumentException;
9		import org.dom4j.io.DocumentResult;
10		import org.dom4j.io.DocumentSource;
11		import org.dom4j.io.SAXReader;
12
13		import javax.xml.transform.Transformer;
14		import javax.xml.transform.TransformerException;
15		import javax.xml.transform.TransformerFactory;
16		import javax.xml.transform.stream.StreamSource;
17		import java.io.IOException;
18		import java.net.MalformedURLException;
19
20		/**
21		* Created by IntelliJ IDEA.
22		* User: Toon.Timbermont
23		* Date: Mar 25, 2005
24		* Time: 6:19:27 PM
25		* To change this template use File | Settings | File Templates.
26		*/
27		public class LeftMenuXSLTImpl implements LeftMenu {
28
29		private String currentItem;
30		private Document currentMenu;
31
32	24	private String stylesheet = PropertyManager.getProperty("menu.xsl.path");
33	24	private String menuXML = PropertyManager.getProperty("menu.xml.path");
34
35	12	private static Log LOG = LogFactory.getLog(LeftMenuXSLTImpl.class);
36
37
38		/**
39		* Constructor based on the currently selected item, defining the currentMenu
40		* @param currentItem
41		* @throws IOException
42		* @throws DocumentException
43		* @throws TransformerException
44		*/
45	24	public LeftMenuXSLTImpl(String currentItem) throws IOException, DocumentException, TransformerException {
46	24	LOG.debug("Building LeftMenuXSLTImpl with currentItem = " + currentItem);
47	24	this.currentItem = currentItem;
48	24	LOG.debug("Building currentMenu");
49	24	currentMenu = getCurrentMenu(getXmlMenu(), currentItem);
50	24	LOG.debug("currentMenu built");
51	24	}
52
53		/**
54		* Method returning the unformatted HTML menu
55		* based on the XSL transformation
56		* @return currrentMenu
57		*/
58		public Document getCurrentMenu()
59		{
60	24	return currentMenu;
61		}
62
63		/**
64		* Helper method that reads the XML menu file
65		* @return
66		* @throws java.net.MalformedURLException
67		* @throws org.dom4j.DocumentException
68		*/
69		protected Document getXmlMenu() throws MalformedURLException, DocumentException {
70	24	LOG.debug("Loading input XML file for menu from " + menuXML);
71	24	SAXReader reader = new SAXReader();
72	24	Document document = reader.read( FileUtils.getFile(menuXML) );
73	24	LOG.debug("Menu loaded");
74	24	return document;
75		}
76
77
78		/**
79		* Helper method that transforms the menu XML to the output HTML
80		* @param document
81		* @param currentItem
82		* @return
83		* @throws TransformerException
84		*/
85		protected Document getCurrentMenu(Document document, String currentItem) throws TransformerException {
86
87		// load the transformer using JAXP
88	24	LOG.debug("starting transformation");
89	24	TransformerFactory factory = TransformerFactory.newInstance();
90	24	LOG.debug("loading stylesheet " + stylesheet);
91	24	Transformer transformer = factory.newTransformer( new StreamSource( FileUtils.getFile(stylesheet) ) );
92
93	24	LOG.debug("configuring stylesheet with currentItem = " + currentItem);
94	24	transformer.setParameter("selected", currentItem);
95
96		// now lets style the given document
97	24	DocumentSource source = new DocumentSource( document );
98	24	DocumentResult result = new DocumentResult();
99	24	transformer.transform( source, result );
100
101		// return the transformed document
102	24	Document transformedDoc = result.getDocument();
103	24	return transformedDoc;
104		}
105
106
107
108		}

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